Muffler Fits John Deere Tractor Fits: John Deere- M, 40, 320; Serviceable for 420 up to SN: 135025 & 440 gas up to SN: 442886 series- Specifications 24-3/8" Overall Length, 3-5/8" Outlet Length, 1.665" Outlet O.D., 14-3/8" Shell Length, 3-1/4" Shell O.D., 2-3/8" Inlet Length, 1.915" Inlet O.D. Replacement Numbers: John Deere- AM364T, AM625T- Has 2 bolt mounting flange. Baffled like original. Polished stainless steel. Can discolor from extreme heat. All JJAgParts items have been hand selected by our team and are continuously monitored for Quality. Should a craftsmanship or fitment concern be identified, JJAgParts will work with you to stand behind our products. JJAgParts is an American owned and operated family business! Here at JJAgParts, we strive for customer satisfaction. If you are not satisfied with your order, please contact us so we can make it right. Note: OEM Part Numbers are for reference only and should be verified before purchase.